My stepmother hummed my dead mother's lullaby the night before my eighteenth birthday, and she got the last note wrong.

That was how I knew she had never learned it from my mother.

I should explain how I came to be standing in the pantry in the dark, wedged between a flour sack and a shelf of canned peaches, with my heart going like something caught in a trap.

Roman had thrown my dinner at the wall. He did that the way other boys crack their knuckles. Kade, the youngest, glanced at the mess and looked away so quickly it almost counted as kindness. I had learned to wait until they left before cleaning up, and the pantry was the quietest place to wait. Eight years in the Hale house had taught me how long a girl could stand still before everyone forgot she existed.

The house had been my mother's once. The Hales simply started calling it theirs.

Tomorrow I would turn eighteen. Nobody had mentioned a cake. They had mentioned the Moon Circle, because on that night the goddess names every wolf's fated mate and the whole pack comes to watch.

I had never admitted this to anyone, but I was looking forward to it. All my life I had wanted one person to choose me without being told to. The moon would do it for me.

Then the kitchen light clicked on.

"Sit," said Vivienne.

She never raised her voice. She set words down the way other people set down glasses, gently, so that only the things she wanted broken would break.

Through the gap I watched her pour two cups of black tea. Roman dropped into a chair and put his boots on my mother's walnut table, right on the corner I had scarred at six with a falling pan.

"The moon names her mate tomorrow," Vivienne said. "It will be one of you. Which one hardly matters. What matters is that Elara says yes."

"Do I have to be nice to her?" Roman asked.

"In public." Vivienne sipped. "Frightened girls make poor wives. Be patient. The land is not going anywhere."

Every wolf in Silverpine knew the law. A Winters daughter inherits her mother's land at eighteen, unless the moon hands her a husband first. Then the land follows him. My father had been reminding me of that for months, in the voice of a man reading terms and conditions.

I pressed a hand over my mouth. For eight years I had assumed the Hales wanted me quiet. I had never once considered that they wanted me wed.

"And if she refuses?" Roman asked, bored.

Vivienne turned her cup a quarter turn on its saucer.

"Then we do what we did last time."

The word landed in my chest like a stone dropped down a well. I waited for the splash.

Last time. Nobody in the history of our pack had ever refused a moon-given mate. It was not done. There could not be a last time.

Unless she meant something else. Unless she meant one gray morning nine years ago, and one white casket in the rain.

I had been nine. Nobody explained anything. They only said my mother was sick, and then she was gone, and eight months later a woman named Vivienne Hale was unpacking boxes in her closet. At the wedding Vivienne told the whole pack she had never met my mother, that she had only come into our lives afterward, out of pity for a grieving family.

I believed her. I was nine. I believed everyone.

Roman shrugged, stood, and left the kitchen whistling. Vivienne stayed behind with her tea.

I should have waited quietly for her to finish. Instead I stood with my pulse in my ears and watched her lift the cup, and then, softly, almost tenderly, she began to hum.

Four rising notes. A fall. A small turn at the end.

My blood went still.

I knew that song. My mother had made it up herself. She sang it to me in the dark when I was small and afraid of the wind, her mouth against my hair, and told me it belonged to nobody else in the world. She never wrote it down. She never sang it for my father. When she died I swore I would never sing it for anyone, so that it would stay hers.

For eight years I kept that promise. And here sat Vivienne Hale at my mother's table, humming it as easily as breathing.

Then she reached the last note, and let it fall.

It was wrong. The turn at the end is supposed to lift, small and sweet, like a hand tucking in a blanket. She dropped it flat, like a door closing.

I cannot explain what happened next. I kept a tally of everything I swallowed in that house. Insults. Hunger. My own name in Roman's mouth, like a coin he was thinking of spending. By seventeen I had stopped counting, because the number no longer mattered. I could swallow anything. And the one thing my body refused to swallow was a wrong note in my mother's song.

I hummed the right one.

It was barely a breath. Less than a whisper. But in that silent kitchen it might as well have been a gunshot.

Vivienne stopped.

She tilted her head, the way a bird does when something moves in the grass. The pantry door stood open two inches, and a clean strip of kitchen light lay across my shoes.

She did not look toward it. She finished her tea, set the cup down without a sound, and switched off the light.

In the dark her heels crossed the tile and stopped just outside the pantry door. Lilies. She smelled of lilies. I stood among the peaches and did not breathe.

"Sleep well, Elara," she said. "Big day."

Then she was gone. I counted her footsteps climbing the stairs. Fourteen steps. Then a door. Then nothing, the long, listening kind of nothing that a house makes when someone upstairs is still awake.

I stayed where I was, shaking, because I had just understood two things.

The first was that she had known I was there the whole time.

The second was worse. A song that was never written down can only be learned by listening, and songs that are overheard lose their endings. Which meant that sometime before my mother died, Vivienne Hale had stood outside her door in the dark and listened, exactly the way I had just stood outside hers.

And tonight, she had heard me.